Using multilevel hierarchical registration strategy for mobility management

Abstract

This paper proposes a multilevel hierarchical registration strategy for mobility management in highly mobile distributed environments to facilitate UPCS. The proposed strategy is based on distributed hierarchical databases in telecommunication networks to form a hierarchical tree: the lowest-level nodes of tree are service nodes, and the other nodes are address information nodes. Our strategy registers personal information in service nodes and keeps track of roaming users' address information in address information nodes, respectively. A send-on-demand protocol of personal information for reducing transaction and lock time of user's home database, and real-time updates and queries in service nodes are investigated. Furthermore, the proposed strategy has been evaluated not only for mobile communication services, but also for worldwide personal communication services in mobility data acquisition, ubiquitous services availability, registration information recovery, and network changes' aspects. Finally, a cost analysis model demonstrates the feasibility of database memory size, updates cost, queries cost, and communications cost in our proposal.